2018-06-14 4:52 GMT-03:00 Roman Haefeli <reduzent@gmail.com>:
Does Pd now look into extra's subfolders?  

If I got it right, the deal is that Pd always searches in "extra" (but not subfolders), so if you have a bunch of things in "extra", the thing is they're always in the search way, so it can be a good idea to keep it as clear as possible. 

My beef with it is that - the way it is presented to me -  it suggests to do things that create confusion later.  As a new user: "Do you want to create ~/Documents/Pd"?

Yes

"Do you want to add it to the searchpaths?"

Yes

It's just one question, the first one, but it does add it to the search path as well.
 
When downloading stuff with deken: "Do you want to install 'mylib' to ~/Documents/Pd?"

Yes

Now, I'm going to load mylib with [declare -{std}path mylib] in my patch which fails. What am I missing here?

Yes, there's the declare issue we know and are addressing, but I'd also like to highlight that Deken also asks if you want to add what you downloaded to the search path. This intentionally provided a working solution to this issue at the time of the release, making it all just work by clicking "yes" to stuff, which is quite fine for newcomers.  

cheers